CVE-2024-48928
HighSummary
Piwigo to aplikacja do tworzenia galerii zdjęć w sieci. W wersjach z gałęzi 14.x, podczas instalacji, parametr konfiguracyjny secret_key jest ustawiany na MD5(RAND()), co ogranicza losowość do 30 bitów, umożliwiając atak brute-force na klucz tajny. Token CSRF jest częściowo budowany na podstawie klucza tajnego, co pozwala na weryfikację udanego ataku.
Risk Assessment
Ryzyko dla organizacji polega na możliwości przejęcia klucza tajnego, co może prowadzić do nieautoryzowanego dostępu do kont użytkowników oraz ich sesji. Mimo że wpływ jest ograniczony, to jednak może to narazić dane użytkowników na niebezpieczeństwo.
Recommendation
Zaleca się aktualizację do wersji 15.0.0, która zawiera poprawkę rozwiązującą ten problem. Dodatkowo, warto rozważyć wprowadzenie silniejszych metod generowania kluczy tajnych.
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Original NVD description (English source)
Piwigo is an open source photo gallery application for the web. In versions on the 14.x branch, when installing, the secret_key configuration parameter is set to MD5(RAND()) in MySQL. However, RAND() only has 30 bits of randomness, making it feasible to brute-force the secret key. The CSRF token is constructed partially from the secret key, and this can be used to check if the brute force succeeded. Trying all possible values takes approximately one hour. The impact of this is limited. The auto login key uses the user's password on top of the secret key. The pwg token uses the user's session identifier on top of the secret key. It seems that values for get_ephemeral_key can be generated when one knows the secret key. Version 15.0.0 contains a fix for the issue.